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The right answer is A in my view.

Split #1: who vs whom.
The verbs had listened/listens/was listening require a subject pronoun rather than an object pronoun. Hence the subject pronoun who rather than whom is appropriate in the context. Based on this split, we can eliminate B and C for the wrongful use of the object pronoun whom.

Split #2: had listened vs was listening.
In order to determine which of the two tenses is correct, we need to look at the meaning of the sentence. There was an event and clearly the event was over and the audience had filed out per the information provided in the non-underlined portion. After the show ended, Serge began to wonder about who had listened/listens/was listening to his long speech. It is worth noting that the action of listening took place in the past. So, the simple present tense listens is incorrect. In addition, the act of listening was not a background activity before Serge began to ponder because the show had ended and the audience had filed out before he began to wonder. Hence, was listening is incorrect. The act of listening is a past prior action hence the right verb tense is had listened. Based on this, D and E can be eliminated for the use of the wrong verb tense.

We are left with A as the best answer that conveyed the sequence of events using the right verb-tense had listened and also the subject pronoun who.

Once the audience had filed out, Serge began to wonder who, if anyone, had listened to his long speech.

A. began to wonder who, if anyone, had listened to his long speech.
B. began wondering whom, if anyone, had listened to his long speech.
C. began wondering whom, if anyone, listens to his long speech.
D. began to wonder who, if anyone, was listening to his long speech.
E. began wondering who, if anyone, was listening to his long speech.
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Once the audience had filed out, Serge began to wonder who, if anyone, had listened to his long speech.

A. began to wonder who, if anyone, had listened to his long speech. - WRONG. Two past actions can never use past perfect tense.
B. began wondering whom, if anyone, had listened to his long speech. - WRONG. Same error as option A + 'whom' usage, if at all correct, slightly changes meaning.
C. began wondering whom, if anyone, listens to his long speech. - WRONG. Present tense with a past perfect tense is wrong + 'whom' usage issue.
D. began to wonder who, if anyone, was listening to his long speech. - WRONG. Going by the meaning Serge instinctively starts wondering after audience had filled out. Here infinitive form of verb changes meaning rather it's wrong.
E. began wondering who, if anyone, was listening to his long speech. - CORRECT. Instantaneously Serge wonders questioning who was listening. Here 'listening' is not a verb but a gerund.

IMO Answer E.
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Ans: D
A)Tense error
b)whom--wrong
c)whom-wrong
d)correct
e)doesn't sound right
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Ans. must be A, for using the correct subject pronoun 'who', the correct tense 'had listened' and the normally accepted infinitive idiom 'to wonder'
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Once the audience had filed out, Serge began to wonder who, if anyone, had listened to his long speech.

A. began to wonder who, if anyone, had listened to his long speech.
B. began wondering whom, if anyone, had listened to his long speech.
C. began wondering whom, if anyone, listens to his long speech.
D. began to wonder who, if anyone, was listening to his long speech.
E. began wondering who, if anyone, was listening to his long speech.

'Who' must be used since it is the subject not 'whom' as the object.
filed out is past tense, therefore Serge already spoke therefore had listened must be used.

Therefore, A
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Bunuel

Competition Mode Question



Once the audience had filed out, Serge began to wonder who, if anyone, had listened to his long speech.

A. began to wonder who, if anyone, had listened to his long speech.
B. began wondering whom, if anyone, had listened to his long speech.
C. began wondering whom, if anyone, listens to his long speech.
D. began to wonder who, if anyone, was listening to his long speech.
E. began wondering who, if anyone, was listening to his long speech.

NOTES: timeline of events in the past listened---filed---wonder, we need two "had" to present two events that happened before another event in the past.

Ans (A)
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